Rogers dancing with an older Peggy can be quite the emotional scene if they choose to do that in CA2. If executed well it can get the waterworks going for me.

Heck the scene where Rogers is saying his goodbyes with Peggy as he prepares himself to crash the ship made me tear up a bit and not many movies do that for me.

Evans has been somewhat of the unsung hero of these movies. Loved him in Avengers (one of the strongest performances in the entire movie).

Imagine what things will be like if Peggy were to finally die in Steve's arms as they're dancing.

But yeah, i could buy that Peggy is in her 90's, maybe even older, just like how did they did that thing with Rose in Titanic.

Heck, they could make it a point for CA2 to be about Steve letting go of his past entirely and moving on with his life, with meeting Peggy for the last time at the end to be the final thing that he needs to do before really moving on.